CN112421207B

CN112421207B - Display screen module and electronic equipment

Info

Publication number: CN112421207B
Application number: CN202011172450.0A
Authority: CN
Inventors: 马荣杰; 邾志民
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-11-25
Anticipated expiration: 2040-10-28
Also published as: CN112421207A

Abstract

The application provides a display screen module, which comprises a cover plate, a polaroid, a touch layer and a glass layer which are sequentially stacked, and further comprises an antenna radiator and a feeder structure, wherein the feeder structure is arranged between the cover plate and the polaroid, the feeder structure is arranged between the touch layer and the glass layer, and the feeder structure and the touch layer are arranged in an insulating manner; and a slot opening is formed in the position, corresponding to the antenna radiation body, of the touch layer, and the feeder line structure is in coupling connection with the antenna radiation body through the slot opening. Because the antenna is integrated on the stacking structure of the display screen module, the antenna module does not need to be arranged independently, so that the space occupation of the antenna design on the electronic equipment is reduced, and the miniaturization design of the electronic equipment is facilitated.

Description

Display screen module and electronic equipment

Technical Field

The application relates to the technical field of communication, especially, relate to a display screen module and electronic equipment.

Background

With the development of wireless communication technology, especially with the coming commercial use of 5G, the application scenarios of wireless communication systems become more and more abundant, so that the requirement for an antenna, which is one of the key components of the wireless communication system, becomes higher and higher. On the one hand, in some application scenarios, the antenna needs to have the conformality, it is disguised, the security is so that integrated car, intelligence is dressed, on the wireless products such as intelligent house, on the other hand, along with wireless communication system's transmission rate is higher and higher, communication capacity is bigger and larger, make carrier frequency higher and higher, and the path loss that the carrier frequency higher and higher brought is bigger and bigger, make it to need array antenna to improve the gain and overcome path loss's influence, and for high gain can beam scanning or beam forming (beamforming) simultaneously again, need adopt phased array antenna (phased antenna) technique, thereby need integrate more and more antennas in limited space, thereby need on traditional antenna design mode basis, open up other antenna space.

In a conventional Antenna design method, an Antenna In Package (AIP) technology and process are mainly adopted to integrate a millimeter wave Antenna, a radio frequency chip, and a Power Management Integrated Circuit (PMIC) into one module. Then, the module is arranged inside the electronic device, and a large space is occupied. Therefore, the prior art has the problem that the occupied space of the antenna is large.

Disclosure of Invention

The embodiment of the application provides a display screen module and electronic equipment to solve the problem that the occupied space of an antenna is large.

In a first aspect, an embodiment of the present application provides a display screen module, which includes a cover plate, a polarizer, a touch layer, and a glass layer, which are sequentially stacked, and the display screen module further includes an antenna radiator and a feeder structure disposed corresponding to the antenna radiator, wherein the antenna radiator is disposed between the cover plate and the polarizer, the feeder structure is disposed between the touch layer and the glass layer, and the feeder structure is insulated from the touch layer; and a slot opening is formed in the position, corresponding to the antenna radiation body, of the touch layer, and the feeder line structure is in coupling connection with the antenna radiation body through the slot opening.

In a second aspect, an embodiment of the present application further provides an electronic device, including the display screen module provided in the first aspect.

According to the embodiment of the application, an antenna radiator and a feeder structure arranged corresponding to the antenna radiator are arranged in a display screen module, wherein the antenna radiator is arranged between a cover plate and a polaroid, the feeder structure is arranged between a touch layer and a glass layer, and the feeder structure and the touch layer are arranged in an insulating manner; the position of the touch layer corresponding to the antenna radiator is provided with a gap opening, and the feeder structure is in coupling connection with the antenna radiator through the gap opening. Thus, the slot opening of the feeder structure is electrically connected with the antenna radiator, so that coupling feed to the antenna radiator is realized. Because the antenna is integrated on the stacking structure of the display screen module, the antenna module (such as an AiP module) does not need to be arranged independently, so that the space occupation of the antenna design on the electronic equipment is reduced, and the miniaturization design of the electronic equipment is facilitated.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional structure diagram of a display screen module according to an embodiment of the present disclosure;

fig. 2 is an exploded schematic view of a display screen module according to an embodiment of the present disclosure;

fig. 3 is an exploded schematic view of a feeder structure in a display screen module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of the display screen module provided in the embodiment of the present application after the dielectric substrate is removed;

fig. 5 is a schematic structural diagram of a display screen module according to an embodiment of the present disclosure;

fig. 6 is an S-parameter curve of an antenna radiator in a display screen module according to an embodiment of the present disclosure;

fig. 7 is a schematic view of a radiation direction of an antenna radiator in a display screen module according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a display screen module, which includes a cover plate 10, a polarizer 20, a touch layer 30, and a glass layer 40, which are sequentially stacked, and the display screen module further includes an antenna radiator 50 and a feeder structure 60 disposed corresponding to the antenna radiator 50, wherein the antenna radiator 50 is disposed between the cover plate 10 and the polarizer 20, the feeder structure 60 is disposed between the touch layer 30 and the glass layer 40, and the feeder structure 60 and the touch layer 30 are disposed in an insulating manner; a slot opening 301 is formed in a position, corresponding to the antenna radiator 50, of the touch 30 layer, and the feeder structure 60 is coupled to the antenna radiator 50 through the slot opening 301.

In this embodiment, the position of the slit opening 301 may be set according to actual needs, for example, in an embodiment, the slit opening 301 is disposed near the edge of the touch layer 30. Since the edge area of the touch layer is usually a touch blind area, the opening 301 formed in the touch blind area does not affect the overall touch operation of the touch layer.

The cover plate 10 may be a glass cover plate, a second transparent adhesive layer 70 may be disposed between the polarizer 20 and the cover plate 10, and the polarizer 20 and the cover plate 10 are bonded and fixed by the second transparent adhesive layer 70. The touch layer may be made of Indium-Tin Oxide (ITO), which may also be referred to as touch layer ITO. The antenna radiator 50 may be disposed on the polarizer 20, for example, in one embodiment, the antenna radiator may be made of ITO material, or may be made of Metal Mesh (Metal Mesh) or silver nanowire, wherein the antenna radiator 50 may have a structure with different shapes, such as a rectangle, a circle, or the like. And are not further limited herein. When the antenna radiator 50 is made of ITO material, the antenna radiator 50 may be referred to as an ITO patch antenna.

Optionally, the feeder structure 60 is insulated from the touch layer 30, and it can be understood that the feeder structure has a predetermined gap from the touch layer 30, or an insulating layer is disposed between the feeder structure 60 and the touch layer 30.

Optionally, the slit opening 301 is disposed near the edge of the touch layer 30, which is to be understood that a distance between the slit opening 301 and the nearest edge of the touch layer 30 is smaller than a preset value, and the preset value may be set according to actual needs, for example, in an embodiment, the preset value may be 3 mm. Of course, in other embodiments, other values may be provided, and are not further limited herein. In the embodiment of the present application, since the edge area of the touch layer is usually a touch blind area, the opening 301 formed in the touch blind area does not affect the overall touch operation of the touch layer. The slit opening 301 penetrates through a first surface and a second surface opposite to the touch layer 30, wherein the first surface is a surface facing the polarizer 20, and the second surface is a surface facing the glass layer 40. The length direction of the slot opening 301 may be parallel to the edge of the touch layer near the slot opening 301, and the length of the slot opening 301 may be one-half of the guided wave wavelength of the operating comment of the antenna radiator 50.

It should be understood that, in order to ensure the reliability of the coupling connection between the feeder structure 60 and the antenna radiator 50, it may be provided that the projection of the feeder structure 60 on the touch layer 30 is at least partially located in the slot opening 301, the projection of the antenna radiator 50 on the touch layer 30 is at least partially located in the slot opening 301, and the projection of the feeder structure 60 in the slot opening 301 and the projection of the antenna radiator 50 in the slot opening 301 at least partially overlap.

In the embodiment of the application, the antenna radiator 50 and the feeder structure 60 corresponding to the antenna radiator 50 are arranged in the display screen module, wherein the antenna radiator 50 is arranged between the cover plate 10 and the polarizer 20, the feeder structure 60 is arranged between the touch layer 30 and the glass layer 40, and the feeder structure 60 and the touch layer 30 are arranged in an insulating manner; a slot opening 301 is formed in a position, corresponding to the antenna radiator 50, of the touch layer 30, and the feeder structure 60 is coupled to the antenna radiator 50 through the slot opening 301. In this way, the slot opening 301 of the feed line structure 60 is arranged to be electrically connected to the antenna radiator 50, thereby enabling coupled feeding of the antenna radiator 50. Because the antenna is integrated on the stacking structure of the display screen module, the antenna module (such as an AiP module) does not need to be arranged independently, so that the space occupation of the antenna design on the electronic equipment is reduced, and the miniaturization design of the electronic equipment is facilitated.

Optionally, in an embodiment, a first transparent adhesive layer 80 is disposed between the touch layer 30 and the glass layer 40, and the touch layer 30 and the glass layer 40 are fixed by the first transparent adhesive layer 80.

Optionally, the position of the feeder line structure 60 may be set according to actual needs, as shown in fig. 1, in this embodiment, the feeder line structure 60 may be located on a side of the first transparent adhesive layer 80 away from the touch layer 30. The first transparent Adhesive layer may be an Optical transparent Adhesive, for example, OCA (Optical Clear Adhesive) or OCR (Optical Clear Resi). Due to the fact that the first transparent adhesive layer is added, the insulating performance of the feeder line structure 60 can be effectively guaranteed, and meanwhile the fixing stability of the feeder line structure 60 is guaranteed.

It should be understood that the number of the antenna radiators 50 is N, the N antenna radiators 50 are arranged at intervals, N is an integer greater than 1, and the feeder line structures 60 are arranged in one-to-one correspondence with the antenna radiators 50.

In the embodiment of the present invention, the N antenna radiators 50 may form an antenna array, so that the antenna radiation performance may be improved. The operating frequency range of the antenna radiator 50 may be set according to actual needs, for example, in some embodiments, the frequency range that can be covered by using a coupling feeding form is 53-67GHz, and the antenna radiator 50 may be a millimeter wave antenna because it can cover 60GHz millimeter waves that are currently mainstream.

Further, the touch layer 30 includes N slot openings 301 that are disposed in one-to-one correspondence with the N antenna radiators 50.

In the embodiment of the present application, the distances from the N slot openings 301 to the edge of the touch layer 30 are the same, and the widths and the lengths of the N slot openings 301 are the same, so that the antenna radiation performance of the N antenna radiators 50 can be ensured to be substantially the same.

Optionally, the N antenna radiators 50 include at least two antenna radiators 50 disposed in a first direction and at least one antenna radiator 50 disposed in a second direction, where the first direction corresponds to a first side of the touch layer 30, the second direction corresponds to a second side of the touch layer 30, and the first side and the second side are disposed adjacent to each other.

In the embodiment of the present application, the first direction is parallel to the first side, and the second direction is parallel to the second side, that is, the first direction is perpendicular to the second direction, where the antenna radiator 50 disposed in the first direction may be understood as an antenna radiator whose length direction includes the slot opening 301 corresponding to the first direction; the antenna radiator 50 disposed in the second direction may be understood as an antenna radiator whose length direction includes the slot opening 301 corresponding to the second direction. As shown in fig. 3, 3 antenna radiators 50 may be disposed in the first direction and 1 antenna radiator may be disposed in the second direction. Since the four antenna radiators 50 are arranged in two different directions, two-dimensional beam transmission and reception can be achieved, and thus, the antenna radiation performance can be further improved in the embodiments of the present application. In addition, the N antenna radiators 50 may obtain two-dimensional angle information, and may realize recognition of two-dimensional gesture actions, so that the display screen module provided in the embodiment of the present application may be used to realize functions such as a millimeter wave gesture recognition radar, and meanwhile, does not affect touch control.

Optionally, in some embodiments, the feed line structure 60 includes a Liquid Crystal Polymer (LCP) feed line structure.

In the embodiment of the application, LCP material is adopted as the feeder of the ITO patch antenna on the screen, so that unnecessary line loss caused by the feed is reduced as much as possible.

It should be understood that the specific structure of the LCP feeder line structure may be set according to actual needs, as shown in fig. 4, in some embodiments, the LCP feeder line structure includes a first metal conductive layer 601, a first LCP substrate 602, a second metal conductive layer 603, a second LCP substrate 604, and a third metal conductive layer 605, which are sequentially stacked, where the first metal conductive layer 601 includes a coplanar microstrip transmission line 6011, the first LCP substrate 602 is provided with a connection via 6021, and the second metal conductive layer 603 includes a strip line 6031, where one end of the coplanar microstrip transmission line 6011 forms an antenna feed point at a position corresponding to the antenna radiator 50, and the other end of the coplanar microstrip transmission line is electrically connected to the strip line 6031 through the connection via 6021 to form a conductive feeder line of the antenna radiator 50.

In this embodiment, the Coplanar microstrip transmission line 6011 may also be referred to as a Coplanar waveguide (CPW), and since the stripline 6031 is a totally enclosed feed structure, electromagnetic waves thereon are not leaked into a space, so as to avoid electromagnetic interference on other components in the electronic device; near the antenna feed, the strip line 6031 is transformed by a metal via to the upper coplanar microstrip transmission line 6011 to achieve a good co-ground of the reference ground of the feed line with the reference ground of the antenna radiator 50. It should be noted that in other embodiments, other feeding structures may also be adopted, for example, LCP feeding structures in the form of coaxial feeding, microstrip line feeding, and the like may be adopted. The third metal conductive layer 605 is connected to a ground terminal, which may also be referred to as a metal ground layer.

Optionally, as shown in fig. 5, the display screen module further includes an LCP Circuit board 90, the LCP Circuit board 90 is provided with a Radio Frequency Integrated Circuit (RFIC) and a connector 901, the LCP feeder structure 60 is electrically connected to the LCP Circuit board 90, the LCP feeder structure 60 is electrically connected to the Radio Frequency chip through the LCP Circuit board 90, and the Radio Frequency chip is electrically connected to the connector 901.

In this embodiment, the rf chip may also be referred to as an rf integrated circuit, the LCP circuit board has a link Area (Bonding Area), each feeder structure 60 converges to the link Area, and is directly led to the touch hot-pressing location, and is switched to the pin of the RFIC through the routing on the LCP circuit board after the hot-pressing. The RFIC may be soldered directly to the LCP circuit board, and the connector may be a Board To Board (BTB) connector for electrically connecting the LCP circuit board to the motherboard.

It should be noted that the shape of the slot opening may be set according to actual needs, for example, in an embodiment, the slot opening 301 may be a long-strip-shaped opening, and a length direction of the slot opening 301 is perpendicular to a length direction of the feeder line structure 60.

In the embodiment of the present application, the length direction of the feeder structure 60 may be understood as the length direction of the coplanar microstrip transmission line 6011, wherein one end of the feeder structure 60 is connected to the RFIIC, and the length of the other end exceeding the slot opening 301 may be generally set to be a quarter of a guided wave wavelength of the operating frequency of the antenna radiator 50, so that the electromagnetic waves radiated by the feeder structure may pass through the slot opening 301 as much as possible and couple to the antenna radiator 50, thereby further improving the antenna radiation performance.

Further, in some embodiments, a screen chip 902 and a touch chip 903 are further disposed on the LCP circuit board, and both the screen chip 902 and the touch chip 903 are connected to the connector.

In the embodiment of the application, the RFIC, the screen chip 902 and the touch chip 903 are integrated on the same circuit board, and the electrical connection with the main board is realized through one connector, so that the space can be saved, and the loss of wiring is reduced.

It should be noted that, in order to ensure the antenna radiation performance of the antenna radiator 50, a clearance area may be provided on the periphery of the antenna radiator, and the clearance area may be understood as an area without metal.

For better understanding of the present application, four on-screen broadband millimeter wave antennas will be described as an example, and in practice, the number of specific elements of the array may be designed as required. In the embodiment of the application, the patch antenna (i.e., the antenna radiator) is placed in a touch blind area (generally, the positions around the ITO touch layer) of the ITO layer, the touch experience is not affected in the area, in order to improve the light transmittance, the patch antenna is also of a Mesh structure and can be made of ITO, metal Mesh and nano silver wires, in order to improve the performance of the antenna, a clearance area needs to be reserved around the patch antenna, i.e., the clearance area does not contain ITO, the larger the clearance area is, the better the antenna performance is, and the better the compromise can be made according to the antenna performance and the touch performance. The placement positions of the four on-screen broadband millimeter wave patch antennas are shown in fig. 3, the four patch antennas are respectively placed at one corner of the electronic device, three of the four patch antennas are arranged at one side, and the other antenna is arranged at one side, so that the gesture of a user can be well recognized by two-dimensional angle information. The S parameter diagram of the millimeter wave dual antenna on the broadband screen is shown in fig. 6, where the identifier 1 indicates that the frequency corresponding to-9.9117 dB is 53.006GHz, and the identifier 2 indicates that the frequency corresponding to-10.053 dB is 67.361GHz. By taking-10 dB as a standard, the impedance bandwidth of the millimeter wave patch antenna on the screen designed by the embodiment of the application can cover 53-67.3GHz, and can completely cover the mainstream frequency band of a gesture recognition radar of 60GHz (57-64 GHz). Fig. 7 is a radiation pattern of a broadband millimeter wave patch antenna on a screen, where the radiation pattern of the antenna has significant undulations due to the presence of the glass cover plate, which causes significant surface waves.

The embodiment of the present application further provides an electronic device, which includes a display screen module, and the structure of the display screen module can refer to the foregoing embodiment and is not repeated herein.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display screen module comprises a cover plate, a polarizer, a touch layer and a glass layer which are sequentially stacked, and is characterized by further comprising an antenna radiator and a feeder structure arranged corresponding to the antenna radiator, wherein the antenna radiator is arranged between the cover plate and the polarizer, the feeder structure is arranged between the touch layer and the glass layer, and the feeder structure is insulated from the touch layer; the position of the touch layer corresponding to the antenna radiator is provided with a gap opening, the gap opening is positioned in a touch blind area of the touch layer, and the feeder structure is in coupling connection with the antenna radiator through the gap opening.

2. The display screen module according to claim 1, wherein a first transparent adhesive layer is arranged between the touch layer and the glass layer, and the touch layer and the glass layer are bonded and fixed through the first transparent adhesive layer.

3. The display screen module of claim 1, wherein the number of the antenna radiators is N, the N antenna radiators are spaced apart, N is an integer greater than 1, and the feed line structures are arranged in one-to-one correspondence with the antenna radiators.

4. The display screen module of claim 3, wherein the touch layer includes N slot openings arranged in one-to-one correspondence with N antenna radiators.

5. The display screen module of claim 3, wherein the N antenna radiators comprise at least two antenna radiators arranged in a first direction and at least one antenna radiator arranged in a second direction, wherein the first direction corresponds to a first side of the touch layer, the second direction corresponds to a second side of the touch layer, and the first side is adjacent to the second side.

6. The display screen module of claim 1, wherein the feed line structure comprises a Liquid Crystal Polymer (LCP) feed line structure.

7. The display screen module of claim 6, wherein the LCP feed line structure comprises a first metal conducting layer, a first LCP substrate, a second metal conducting layer, a second LCP substrate and a third metal conducting layer, which are sequentially stacked, the first metal conducting layer comprises a coplanar microstrip transmission line, the first LCP substrate is provided with a connecting via, the second metal conducting layer comprises a strip line, wherein one end of the coplanar microstrip transmission line forms an antenna feed point at a position corresponding to the antenna radiator, and the other end of the coplanar microstrip transmission line is electrically connected with the strip line through the connecting via to form a conductive feed line of the antenna radiator.

8. A display screen module according to claim 6, further comprising an LCP circuit board having a radio frequency chip and a connector, the LCP feed line structure being electrically connected to the LCP circuit board, the LCP feed line structure being electrically connected to the radio frequency chip through the LCP circuit board, the radio frequency chip being electrically connected to the connector.

9. The display screen module of claim 8, wherein the LCP circuit board further comprises a screen chip and a touch chip, and both the screen chip and the touch chip are connected to the connector.

10. The display screen module of claim 1, wherein the slot opening is a strip-shaped opening, and a length direction of the slot opening is perpendicular to a length direction of the feeder structure.

11. An electronic device, comprising the display screen module according to any one of claims 1 to 10.